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Diffstat (limited to 'fs/xfs/xfs_file.c')
-rw-r--r--fs/xfs/xfs_file.c25
1 files changed, 16 insertions, 9 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index f5392ab2def1..ebe9b8290a70 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -402,19 +402,26 @@ xfs_file_splice_read(
if (XFS_FORCED_SHUTDOWN(ip->i_mount))
return -EIO;
- xfs_rw_ilock(ip, XFS_IOLOCK_SHARED);
-
trace_xfs_file_splice_read(ip, count, *ppos, ioflags);
- /* for dax, we need to avoid the page cache */
- if (IS_DAX(VFS_I(ip)))
- ret = default_file_splice_read(infilp, ppos, pipe, count, flags);
- else
- ret = generic_file_splice_read(infilp, ppos, pipe, count, flags);
- if (ret > 0)
- XFS_STATS_ADD(ip->i_mount, xs_read_bytes, ret);
+ /*
+ * DAX inodes cannot ues the page cache for splice, so we have to push
+ * them through the VFS IO path. This means it goes through
+ * ->read_iter, which for us takes the XFS_IOLOCK_SHARED. Hence we
+ * cannot lock the splice operation at this level for DAX inodes.
+ */
+ if (IS_DAX(VFS_I(ip))) {
+ ret = default_file_splice_read(infilp, ppos, pipe, count,
+ flags);
+ goto out;
+ }
+ xfs_rw_ilock(ip, XFS_IOLOCK_SHARED);
+ ret = generic_file_splice_read(infilp, ppos, pipe, count, flags);
xfs_rw_iunlock(ip, XFS_IOLOCK_SHARED);
+out:
+ if (ret > 0)
+ XFS_STATS_ADD(ip->i_mount, xs_read_bytes, ret);
return ret;
}